"Contemplating is receiving." (St. John of the Cross) What we receive in prayer is the Spirit, who makes all creation new, moment by moment. It is the Spirit who rebirths us within the caves of our hearts. The case is a metaphor for this silent withdrawal, this going away to be alone, to listen, to gestate the Spirit, to rebirth ourselves. The reborn self is the child of wisdom born in solitude.
Stillness is our most intense mode of action. It is in our moments of deep quiet that is born every idea, emotion, and drive which we eventually honor with the name of action ... we reach highest in meditation, and farthest in prayer. In stillness every human being is great; he or she is free from the experience of hostility; she or he is a poet and most like an angel.